Recent content by Nat2000

Yes, they are in a separate temporary terminal block. Thank you so much.

That's brilliant @terryplumb. I have now put the two orange (central heating) wires back and left the one from faulty actuator out. Now the heating is working perfectly and going to stand by when demand is off. And showing '0' boiler status. This is brilliant analysis and perfect steps. Can't...

Yes, one for downstairs, one for upstairs and one for hot water.

It turned out to be this one which is live coming from the hot water motorised valve! Problematic motorised valve attached below.

Following the steps now. Will keep you updated. Thank you

Are you referring to the microswitch in the motorised valve? Does it dictate demand? I believed the thermostat does it. When the room temperature is less than required, it triggers the pump, the motorised valve and the boiler to go ON. The boiler then keeps firing up and off depending on its...

Yes, I have a suitable multimeter. What voltages do I need to check.

Thanks for your reply. The boiler won't reset even when it is cold. I have tried switching it off for 8 hours then turning it on, still it doesn't reset. It shows 3 then goes to 'c' and fires up even when there is absolutely no demand. It should have been in stand by showing '0' without firing...

Looks like the motorised valve needs replacing. Not sure why reset shouldn't work on the boiler though.

I can see that the lever on one valve slides perfectly whereas one on other is kinda stuck at closed position. But this valve does open and close as we do get hot radiators when ON. The banging sounds come only when demand is going off. I presume this is when valve should close, Isn't it? Still...

I believe, the motorised valve is 2 port. It is attached to a straight pipe. I believe it allows or stops the flow depending on whether there is demand or not

Hi All, Our Ideal icos he24 boiler display constantly shows 'c' and the reset does not work. It heats up the water and central heating. But makes loud banging sounds when the CH demand is turning off. Then shows HA over heat error code. After few minutes goes back to 'c' and repeats. I think if...